Granted Patent
Utility
US 5,988,280 · App. 08/772,314
Use of engine heat in treating a well bore
Inventors:
James B. Crawford, Michael Jude LeBlanc
Patented Case
View Patent ↗
Granted: Nov 23, 1999
Filed: Dec 23, 1996
Inventors
James B. Crawford
Michael Jude LeBlanc
Assignee (at issue)
Ambar, Inc.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.